Quantitative Aptitude - Arithmetic Ability Questions

Which of the following is correct?

Calculate the simple interest if Rs. 1800 is invested for 10 years at a rate of 5% per annum.

The speed of car B is half the speed of car A. If car A covers a distance of 120 km in 1.5 hours, what is the speed of car B?

Josna takes 4 hrs 30 min in walking a distance and riding back to some place where she started. She could walk both ways in 5 hrs 40 min. The time taken by her to ride back both ways is

If √(1 + cot2A) = x, then the value of x is

Determine the value of y-1y2 when y4+1y4=34

If a.sin 45°.cos 45°.tan60° = tan 245° ­ cos60° then find the value of a ?

Select the odd word/letters/number/number pair from the given alternatives.